Please help in building basic rig

[Raghavg]

Hi, I want to build a basic home use/gaming ( WoW,CS etc), for about 15000 rupees.

I already have a monitor, keyboard, mouse, speakers, ups,dvd writer,windows xp home.
Rest all i need.

1.Power supply
2.Case
3.Motherboard
4.CPU
5.Heatsink/fan for the CPU(if needed)
6.Memory
7.Video card (unless you?re using onboard video)

Please suggest all the components along with current prices in Indian markets (if possible).